<template>
    <div class="app-container">
        <el-form label-width="120px">
            <el-form-item label="讲师名称">
                <el-input v-model="teacher.name" />
            </el-form-item>
            <el-form-item label="讲师排序">
                <el-input-number v-model="teacher.sort" controls-position="right" :min="0" />
            </el-form-item>
            <el-form-item label="讲师头衔">
                <el-select v-model="teacher.level" clearable placeholder="请选择">
                    <!--数据类型一定要和取出的json中的一致，否则没法回填因此，这里value使用动态绑定的值，保证其数据类型是number-->
                    <el-option :value="1" label="高级讲师" />
                    <el-option :value="2" label="首席讲师" />
                </el-select>
            </el-form-item>
            <el-form-item label="讲师资历">
                <el-input v-model="teacher.career" />
            </el-form-item>
            <el-form-item label="讲师简介">
                <el-input v-model="teacher.intro" :rows="10" type="textarea" />
            </el-form-item>
            <!-- 讲师头像 -->
            <el-form-item label="讲师头像">
                <!-- 头衔缩略图 -->
                <pan-thumb :image="String(teacher.avatar)" />
                <!-- 文件上传按钮 -->
                <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
                </el-button>
                <!--v-show：是否显示上传组件   
                    :key：类似于id，如果一个页面多个图片上传控件，可以做区分  
                    :url：后台上传的url地址
                    @close：关闭上传组件
                    @crop-upload-success：上传成功后的回调 -->
                <image-cropper v-show="imagecropperShow" :width="300" :height="300" :key="imagecropperKey"
                    :url="BASE_API+'/eduoss/file/upload'" field="file" @close="close"
                    @crop-upload-success="cropSuccess" />
            </el-form-item>
            <el-form-item>
                <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>

<script>

import teacher from "@/api/edu/teacher"
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
    components: {
        ImageCropper,
        PanThumb
    },
    data() {
        return {
            teacher: {
                name: '',
                sort: 0,
                level: 1,
                career: '',
                intro: '',
                avatar: '',
                id: ''
            },
            saveBtnDisabled: false, // 保存按钮是否禁用,
            BASE_API: 'http://localhost:9001',
            imagecropperKey: 0, // 上传组件id
            imagecropperShow: false,
        }
    },
    methods: {
        cropSuccess(data) {
            this.imagecropperShow = false
            this.teacher.avatar = data
            // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
            this.imagecropperKey = this.imagecropperKey + 1
        },
        // 关闭上传组件
        close() {
            this.imagecropperShow = false
            // 上传失败后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
            this.imagecropperKey = this.imagecropperKey + 1
        },
        saveOrUpdate() {
            this.saveBtnDisabled = true
            if (this.teacher.id === null || this.teacher.id === '') {
                this.saveData()
            } else {
                this.updateData()
            }
        },
        // 保存
        saveData() {
            console.log(this.teacher)
            teacher.save(this.teacher).then(response => {
                return this.$message({
                    type: 'success',
                    message: '保存成功!'
                })
            }).then(resposne => {
                this.$router.push({ path: '/edu/teacher' })
            }).catch((response) => {
                // console.log(response)
                this.$message({
                    type: 'error',
                    message: '保存失败'
                })
            })
        },
        fetchDataById(id) {
            teacher.getById(id).then(response => {
                this.teacher = response.data.teacher
            }).catch((response) => {
                this.$message({
                    type: 'error',
                    message: '获取数据失败'
                })
            })
        },
        // 根据id更新记录
        updateData() {
            this.saveBtnDisabled = true
            teacher.updateById(this.teacher).then(response => {
                return this.$message({
                    type: 'success',
                    message: '修改成功!'
                })
            }).then(resposne => {
                this.$router.push({ path: '/edu/teacher' })
            }).catch((response) => {
                // console.log(response)
                this.$message({
                    type: 'error',
                    message: '保存失败'
                })
            })
        }
    },
    created() {
        if (this.$route.params && this.$route.params.id) {
            const id = this.$route.params.id
            this.fetchDataById(id)
        }
    }
}
</script>

<style>

</style>